surjective function vs surjection

surjective function and surjection both are nouns.

Word	Noun	Adjective	Verb	Adverb
surjective function	Yes	No	No	No
surjection	Yes	No	No	No

As nouns, surjective function and surjection are synonyms defined as:

surjective function and surjection: a mathematical function that is an onto mapping.

Other synonyms of surjective function include onto function.

surjective function (noun)	surjection (noun)
a mathematical function that is an onto mapping.	a mathematical function that is an onto mapping.